Oiiuketts



(No Model.)

S. 8: S. M. HAMBLIN.

LET-OFF MOTION FOR LOOMS.

No. 399,195. Patented Mar. 5, 1889.

S TLYANL'S llAMllLlY AND FilltPll'EX PATENT error.

31. nations, or rtvnor'ru', imssit- LET-OFF MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 399,195, dated March 5, 1889; Application filed February 25, 1888. fiierial N0. 265,284x (N0 model.)

To aZZ whom it may concern.-

Be it known that we, SILVAN'US I'IAMBLIN and STEPHEN M. .liAMBLIN, citizens ot the United States, residing at Plymouth, in the 5 county of Plymouth and State of Massachusctts, have invented certain new and useful lmprovomcuts in LetOtt Motions t'orliooms;

and we do hereby declare the following to be a full, clear, and exactdcscription of the invenl tion, such as will enable others skilled in the art; to which it zn ipcrtains to make and use the same.

Our present invention relates to certain improvements in let-oft motions forlooms.

In this improvement we provide a let-off motion for the warp, which we construct and arrange as follows: \Yc apply a cord or strap to the periphery of a disk on the end of the wi'irp-heam, and the ends of the said cord or strap we secure to a lever pivoted to the frame of the loom, the opposite end of said lever being free. To this lever is fixed an upright which forms a part of the said lever. ()n the edge of said lever, at its upper end, sets a grooved wheel, which at its axis carries a weight which causes said lever to act, through the said strap or cord, upon the warp-imam. Near the top of the standard is pivoted an angle-lever provided with an arm at its lower end, terminating in a shoe which bears upon the upper inclined edge of the first-named lever and serves as a stop to the weight-carrying wheel. Pivoted upon the upper part of the lever connected to the standard aforesaid is an arm terminating in a yoke, which latter presses against the warpthreads on the warp-beam.

In our drawing illustrating the invention, the figure shows a side elevation of the warpbeam and its relation to the mechanism of the let-cit.

Referring to the drawing, S is the disk secured to the ends of the warp-beam. Over this disk passes the cord or strap g, which is secured to the lever T. The lever T is pivoted to the frame of the loom at the point p, the other end of the said lever, which inclines upward, being tree.

W is the upright or standard secured to the lever T. Upon the upper inclined edge of the lover T runs the grooved wheel 0;, and z is the weight attached to the said wheel. Year the top of the standard V, at a is piv {oi ed the lover a, and from. this lever prol j ects rearward the arm it, provided with the yoke a which. presses upon'the warp wound upon the wa rp-beam.

u is a horizontal rod connected with the lower end of the lever and provided with the shoe o which latter bears upon the lever T beneath the wheel 1'. Now as the amount of warp of the beam necessarily diminishes as l weaving progresses the yoke a carried by the arm a of the lever u, is permitted to move nearer the axis of the warp-beam by reason of the decrease in the diameter of the roll of warp, the yoke being held in contact with the surface of the warp by the wheel w bearing on the shoe n. Thus as the warp unwinds, the said wheel .r, with its weight 2, gravitatcs upon the inclined plane of the lever T toward the fulcrum of the latter, thereby diminishing the leverage upon the cord or strap g, and consequently reducing the friction oi the cord orstrap upon the disk S of the warp-beam, and gradually but con stantly and uniformly reducing the tension on the warp.

Our let-cit mot-ion thus described possesses the advantage of automatic action, so that little attention is required to insure perfect action of the parts.

Having thus describci'l our invention, what we claim as new, and desire to'secure by Letters Patent, is

The combination, with the warp-beam having a disk, as described, and the cord or strap embracing said disk, of the lever T, pivoted to the frame of the loom and having the cord or strap connected thereto, the weight and wheel carrying the same supported by the said lever T, the upright XV, extending from said lever T, and the lever a, pivot-ed thereon, having an arm provided with a yoke to bear upon the warp, and a connecting-rod and a shoe bearing upon the said lever T, and controlling the positions of the wheel and weight upon the lever, all arranged substantially as and for the purpose set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

SIL VAN UQ HA MBLIN. STEPHEN M. lrIAMBLIN. Witnesses:

EDWIN Damon, 5. WM. DITNHAM. 

